Button-fly-scalloping machine.



nu. 7oo,|4|. Patented may I3, |902.

' J. c. GRALL. y

BUTTON FLY SGALLOPING MACHINE..

(Application led Jun. 8, 1899.)

. (no mim.)

UNITED STATES PATENT OFFICE.

JOSEPH G. GRALL, OF DETROIT, MICHIGAN, ASSIGNOR, BY-MESNE ASSIGN- MENTS,TO THE ROBERT MITCHELL MACHINERY COMPANY, A CORPORA- TION OF MICHIGAN.

BUTTON-FLY-SCALLOPING MACHINE..

SPECIFICATION farming para of Letters Patent No. '7oo,4141,'datea May13,1902.

Application filed January t, 1899.

T @ZZ w/wm t may concern.-

Be it known that I, .TosEPH G. GRALL, a citizen of the United States ofAmerica, residing at Detroit, in the county of IVayne andState ofMichigan, have invented certain new and useful Improvements inButton-Fly Scallopers, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to machinery for the manufacture of shoes, and itis specifically intended to accomplish the work of trimming the edge ofa button-fly of a shoe, and has for its object toproduce a machine forthis kind [5 of work whichrwill' accomplish the work in a moreexpeditious and perfect manner; and to this end my invention consists inthe combination, with a reciprocating knife and worksupporting table, ofmeans for'positioning the 2o work in relation to the knife, all as morefully hereinafter described and claimed in the speciication and shown inthe accompanying drawings, in whichj Figure l is a side elevation of mymachine. 2 5 Fig. 2 is an enlarged vertical section ofthe feed-table.Fig. 3 is a plan thereof, showing in dotted lines the guide-patternadjusted thereon.- Fig. Ltis a plan of the guide-pattern. Fig. 5 is abutton-Hy blank, showing 3o in dotted lines the work of the machine.Fig. 6 is a plan of the feed-table with the work in position thereon,illustrating the operation of the machine. l

A is the frame of the machine; B, the driveshaft; C, a crank on Vthedrive-shaft; D, a; crank-pin on the crank C; E, a cross-head providedwith vertical guides F, engaging in vertical guide-bearings G in theframe. H is a horizontal slot in the cross-head into whichl 4o thecrank-pin engages, and I a knife detachably and adj ustablysecured ltothe cross-head, all so arranged that if motion is imparted to thedrive-shafttheknife I will have a vertical reciprocating motion.

Below the knife is arranged a rotary table J, having adownwardly-projecting central stem a," journal'ed in a Vertical bearingl) of the frame. This table is formed with a recess in which a woodencutting-block K is se- Serial No. 701,312. (No model.)

cured andwith peripheral ratchet-teeth c, by means of which intermittentrotary motion is communicated to the table through the medium of'asuitable feed-pawl L, actuated by a cam M on the drive-shaft B. table Jis also provided Withsuitable means, such as the adjusting-screw N, foradjusting the table higher or lower.

In frontpof the rotary table is placed the pattern-guide support O,preferably pivotally secured by the bolt d to the frame. Its surface isin a horizontal plane with the top of The rotary the cutting-block K,and its inner edge approaches the cutting-block K closely and isprovided with an upward projection c, placed at the inner end of a linef, cut or otherwise marked on the surface of the table, and` which lineis substantially radial to the cuttingblock K.

P represents a button-fly blank prepared as heretofore, the dotted.lines showing the manner in which the edge is to be trimmed,

' and Q is the guide-pattern used in connection therewith in doing thework of trimming. This guide-pattern I make of thin sheet metal with twoprojecting guide-lugs f g at the opposite ends and with a series ofnotches h cut in the front edge, which notches are adapted to fit theprojection e of the pattern-guide support. In addition the guide-patternhas a series of lines or marks ,one for each notch, which lines aresubstantially at'right angles to the front edge at the point where thelines y intersect with the frontredge.

V The parts being constructed and arranged as shown and described, theyare intended t `operate as follows: Theoperator takes the istering theguide-mark i of each notch with the mark f the edge of the button-ily istrimmed olf by successive operations of the knife along the dotted linesshown in Fig. 5.

The machine requires but small power, which may be transmitted to it bya sewingmachine belt passing over a grooved pulley T, placed on thedrive-shaft, and it maybe operated by applying the power continuouslyor, preferably, through a suitable clutch under the control of afoot-lever, whereby the operator by depressing the foot-lever causes theshaft B to make one revolution.

As devices for this purpose are in common use, I do not deem itnecessary to describe it any further.

The knife which I use is of a novel form. It has a vertical bladeforming at the lower end a cutting edge which resembles the wellknownform of a bracket-mark, and it has a vertical knife-edge which projectsin front like a iin and divides the knife into two parts, cach of whichcuts a little more than one-half of a scallop, while the vertical iinwith its lower cutting edge makes a sharp knife-cut between thescallops. By reason of this construction the work of the knife is muchsuperior to that obtained heretofore with a knife shaped like acrescent.

The rotary table .I at each revolution of the drive-shaft rotates thedistance of one tooth of the ratchet. In this Way the cuttingblock Kwill be constantly changed under the knife and wear much longer, and ifit has to be cut down the table can be raised up by means of the adjlisting-screw N. As the cutting-block K is tightly wedged in its recess,I make a hole j through the stem, so that the block can be driven outfrom the under side. By hinging the pattern-guide support O in front itcan be adjusted from or toward the cutting-block K.

The pattern-guide is substantially of the shape of the button-fly, andof course there has to be different sizes, according to the differentsizes of blanks, and each guide-pattern is given sufficiently greaterwidth than the button-fly to prevent the marks 'i from being entirelycovered up when the blank is affixed thereto. The notches 7L are coveredover by the blank; but as the operator holds and guides the work withhis hands during the operation he can rely on his sense of feeling toguide the notches 72. properly into engagement with the projection e.

IVhile I have described my machine as a button-fly scalloper, it isobvious that it may be advantageously used for other work where thetrimming or scallopin g has to follow along an irregular line.

What I claim as my invention isl. In a button-ily sealloper, thecombination with a rotary table, and a vertically-reciprocatingscalloping-knife above the table, of a separate guide-pattern adapted tocarry the work in fixed relation thereto and projccting with its rearedge in rear of said work, a series of guide-marks on said exposed portion and a support for said guide-pattern on the table having a fixedguide mark or marks with which those of the guide-pattern are adapted toregister separately and thereby position the work in relation to theknife.

2. In a button-ily scalloper, the combination with a table and avertically-reciprocating scalloping-knife above the table, of a separateguide-pattern for the work adapted to.

support the same and having an exposed portion projecting in rearthereof, and guidemarks formed thereon, means on the guidepattern forclamping the work thereon in a prescribed position, a support for theguidepattern adjust-ably secured in front of said table and means on theguide-pattern and its support for positioningtheguide-patternupon thesupport in different prescribed positions.

3. In a button-fly scalloper, the combination with the frame andcutting-block supported thereon, of the vertically-reciprocatingscalloping-knife, the separate guide-pat tern provided with means forclamping the blank thereon, the series of notches cut into the frontedge of the guide-pattern, and the pattern-guide support having aprojection with which the notches on the guide-pattern are adapted toregister.

4. In a button-ily scalloper, the combination with the frame andcutting-block supported thereon, of a vertically-reciprocatingscalloping-knife, a separate guide-pattern for supporting the blankthereon and means for locating the guide in prescribed relation to theknife foreach scallop, said guide-pattern having projecting lugs at theends registering with the ends of the blank.

5. In a button-ily scalloper, the combination with the frame and rotarytable supported thereon, of the reciprocating scallopingknife adapted tocut portions of two adjacent scallops, the notched guide pattern withwhich the blank is adapted to be registered having a series ofguide-marks thereon, and the pattern-guide support having the projectione and guide-mark f.

6. In a button-y-scalloping machine, the combination with anintermittent rotary cuttin gblock,and a vertically-reciprocatin gscalloping-knife, of a separate guide-pattern for carrying the blank,said guide-pattern having projections at its opposite ends register ingwith the ends of said blank, a xed support for said guide-pattern infront of the cutting-block and means on the guide-pattern and itssupport for adjusting the guidepattern in predetermined positions inrelation to the knife to cut a series of connected scallops along oneedge of the blank.

'7. In a ily-scalloping machine, the combination with the frame of anintermittent rotary table having a cutting-block secured thereon,avertically-reciprocating scalloping- IOO IIO

knife, a separate guide-pattern for support# ing the blank and Withwhich the blank is adapted to be registered, an adjustable pattern-guidesupport for said guide-pattern in front of the table, a projection onsaid support, a series of notches on the guide-pattern adapted to beregistered with said projection, a series of guide-marks on thepattern-guide, and a guide-mark on the support with which

